Circular saw machine



Aug. 31, 1943.

W. H. WOODWARD CIRCULAR SAW MACHINE Filed Feb. 24, 1941 2 Sheets-Sheet linventor \Jilliam H.woo lwarc' Aug. 31, 1943- w. H. WOODWARD CIRCULARSAW MACHINE Filed Feb. 24, 1941 2 Sheets-Sheet 2 3nventor William Hxxomlward f (Iftorneg;

equal or praportionat 1 f mm 5m: side view andpgrticulgplyjtqhigfiards'tor such machines.

r 'Ag obieqt ot the inventionis to adapt the 'saw "oi fflie circular sawmachinegto lowered rgl'dtlVej to a; veritable; and .-to dismse'acontrol; hbemathe path of 'ithgfiwuyk and; malice olthesawgsaidkhoebingidapted to 115 bera ised andv l te iedAu 31,19,43 r

s i fbd bythelworkito anextent qetermiiledeby'the V worktthlckness, mminset 8w un so 1 3 to she accuratel mam,

"Ia-M92 15 8 right 716 0 nae vegticallywd isposedicircular saw and} Qjfawork table'formedwith'aflo; {through wmcli dn upperportion'otthe sawmaylpmject to engdg'ea support. For, reasons he reingfter disclqsedwit.isr

mine 19% :8. e tame the let; (m

i tin th tf xci txima :b' en.

wgrdly therefn om in exterior :prgximitY t oythe fmpt ahdgreari walls bf"Gibb- 110115138 5:; ets having micuate, edges 1a :andxfic palp ofspaceld plns EprOJ'EICtiIiTg .rigidlyfrbmthe? -s aid mandrg Min 5.15:The bearing'slevis j uml dm a lgejve'bearm giz 1 the axis of said shaft.

projecting forwardly andapproaching the vertical axis of the saw, at anacute angle to the vertical I plane of the saw,asbest appears in Fig. 1;It will be noted that the arms 22 and 26, together with the rock shaft23, form a yoke, pivotal about Over a rectangular head integrally.formed upon the forward end of the arm 26, there projects a lug 28integrally projecting from the up; per end of a shank lil -integrallycarrying atitsi lower end a'triangular shoe 30; normally seating on thetable 4. Said shoe is materially Wider than the saw and isbisectedfbythe central rs tational plane of the saw.

as best appears in Fig. 5, to-afford clearance to A work-engaging edgeof said shoe extends forwardly from its table-ii- 7 gaging apex, at anacute angleto"the"table,'said 5., apex being substantially aboveethe sawaxis Thuswork advancingalong the" table to the saw must encounter andraise theshoe 30'to a seat;-

7 upon such work, before reaching the saw. The

seating apex of the shoe is"upwardly channeled,

the saw teeth as they cut through the top; face of the workxj The shank/29 isve'rtically slotted, I as indicated atei; and a bolt 3+2,'tap1; edinto the head 2T,"p'rojejcts through the slott3l "and is provided with'awing head 33 forcla'inping said shank andthe shoe to theheadin-selective angular positions of the arm'26'." To permit" anaccurate adjustment Qlf'the'headQ 21 with reference to the shoe 30,--anadjusting screw 34, projectingtoward: l the table 4,"is"tappedfthroughsaid;head; passing- 7 freely'through the lug 28, the' upper end of saidscrew carrying ahead 35 seating on said lug and; providing 'foractuation of the screw? Upward; withdrawal: of; said screw from the:head permits", the latter, together with its" supporting yoke' to:

s'wingdovvnwardly about the rock shaft 23, as ex-- emplifiedtin' d'ashlines in'Fig. 2. It is preferred to form'the'shank 29 witha rib--25bearing against" theifr'ont face of 'thefhead Z'l to? assure constantparallelism of t-hefslot EErWith the adjusting screwj3,4. .t if L v I iountedt on the L'forward "end of, the shoe 30,}Iby mearis of; a bolt.3'I iis apairj off rearwardly projecting triangular guards -38 one'Copivotally indicate thesaw adjustment".

at each side ofl the's hoegsaid guards having apices normally freely"seating upon the table "a i'f ew inches forward of the seating point*of' the shoe and having I edges forwardly and upwardly "-exe, tendingfrom saidapicesfin-an acutely angular relation to the table; Thus saidedges are adapt? edto encounter work, ;-a;dvancing to the sawiandj toeffect raising of the guardsiandseating there of upon 'the workfIfhe-seating-apices oi athe Y guards preferably present fairlysharpedgesto H the wcrk ofiering strong resistancctb:such back .thrustasiis applied tothe work by the saw.; '3}

, In order .to reduce and nicelyjegulatethe 'efs f vo ved rai ina hehOetQk nd s w it is preferred to j subject the -yoke t a spring el :i li al ncin i i A, e ravitat1onal turnm m en of "sa d e r work? the latteritself serves; :as-a highly effective V e prevented from materially" Iprojecting above tli'e workf-Primary danger "to the.Foperator} of;the-zcircular-sawlliesrinthe sud- "the bla de as it cuts throughthedenex dsure evefidz r eliminated by'the de's'cribed cons't'ruction sincethe guards .375 lf op-downbehind'theworkas itsrear hes' the saw,preventing: any -ap'plica ust; to; the workfi n theiplane of the" a, 'Asillnstrated fa.

coiled spring 351 is reajrwar dly and upwa1 d:1y x

tended frorna'n' anchoring bracket' lqbn the h ousfing 7 to a .short arm4] secured to anddownwardly projecting from a -se'tfcollar 4 2fixed onthe rock" shaft 23', the-tension off said spring being-applied. wingmut'43; adjustab1eon an viously; otherv types of springsf'or weights. 'mightserve thesame; purpose; Theset f' collar; 42. fur-'- ZB Yfromlengthwiseshifting; f

.ation of h ha ,i

is permitted by dimensions of the machinegan gaging the arm 22 in alimiting raised position.

. r In use of the described saw, the advancing work first encounters theguards 38, swinging them upon their common pivot 31' until they reston'l the Work. gUponma' slight-further advance, the work enga'ges theshoe-30; raisingsame to seat on the work. Since the shoe is normallyfirmly j clamped to the head21, the yokecomprised by V armsil and 25 isupwardly swung about the'rock i shaft 23', thusraising the saw. Thelift-of the I shoe being equal to the thickness of the work,

' ndthe lift of the saw being substantially equal wto' that, of theshoeiit follows that the saw will beraised,af'distance substantiallyequal to the work thickness. 7 If the saw blade projects initiallyslightly above the table, as for example of an inch,'it will: be raisedsufficientlyto cut through the worklwitha slightexcesstoassure, completesevering. lf it" is'jdesire d" tobnly' partially sever thework', the sawis initially' lowered below the'tabletop a distance 'equal to thedifference between the workz thickness and the: de-' sired depth-ofthekerf: to be cut ,',such anadjustment being shown; in dashilinesinFig; 2 Thus if acne inch board is tobe severed through half itsthickness, the sawi'isdropped one halfinch Primary advantage of thedescribed menses in factthatan' ope tor of jthe machineispositively'preventedfrofn engaging his hands t with theQteethof therotating], saw. Duringfma jor portion ofiengagementtbf the sawby theguardgsihcethe s a a piece of Work. This "danger is end appro saw;

.j I the constru'ction illustrated the arm 22 'is' substantiallyhorizontal when the saw periphery is substantially tangential'to.thetop'planefof the table 1 Larger or smaller sawsmayjae establishedin'the same relationfto the -table3by -suitably changing. theangularmountingiof therarnifi on The U haped form of rearip ortioi 1machinen m 1 r ads'Withih arm '22 to restrainthe shaft v :It Twill :be;vunderstoodthat a miter" gauge or other common accessories inaybeappliedto de scribed saw; if desired. 5 1' I the yoke and saw, as wouldresult from an effort to sever work of greater thickness than of the armQZG-andthe divergent relation of' thelvertical.

planeof, said arm .=to' that oflthe sawtends' to es tablisha.-maximun'f:'clearancei for both the Width and length :ofworkdeliveredfto' the described I I, f A circular saw machine comprising acircu lar saw, atable for supportingwork fed to the saw, the axis ofrotation of the saw being below the table level and'the saw extendingperipherally above said level .to engage the work, abeariing mountingthe saw rotatively, a shoedisposed substantially above the sawandnormally infthe work path and in close proximity 'to thegplaneestablished by the work 'supporting face of the and presenting tothework a face acutely diver gent to the table; a support fOl said shoespaced 7 @above the table, a yoke rigidly connecting said table, saidshoe presenting to thework arace converged acutely toward the tableinuthe directionof work feed, and thus being adapted tofbe raised by thework, and a connection from the; [shoe to the bearing for raisingthebearingpro ,portionatelyto raising of theshoe,*whereby the depth ofcuttaken by the, saw may be regulated I v i by the thickness of thework.

2. A circular saw machine comprising" a circular saw, a table forsupporting work fed to said 1 saw, a support mounting the sawrotatively, a

shoe disposed aboveand normally in close proximity tosaid tableandsubstantiallyabove the 1 saw and presenting to the work afaceconverged acutely toward the table in the direction of work fed, asupport for said shoe, and meansfpivotally mounting said supports andinterconnecting them;

a for up and down travel in unison,- whereby said shoe is adapted'to beraised by work fed to the saw' and to correspondingly raise the saw. v

v 3; In a circular saw machine as setforth'in claim 1 means foradjusting said connection to selectively regulate the spaced relation ofthe 'sawtotheshoe.

4; In a circular saw machine as set forth in claim 1, aspring actingonsaidjconnectionto assist in raising the saw. I h x 5, In a circular sawmachine as set forth in claim 1, an adjusting screw attaching said shoeto said connection and adapted to raise or lower the saw relative to theshoe.

6. In a circular saw machine as v to said connection andadapted to raiseor lower the saw relative, to the shoe, and means forrig-f supports,and'means pivoting the yoke to turn about an axis spaced from saidhousing andparallel to the saw axis, whereby the shoe; may be raised bythe work a dwill correspondingly raise the saw.

' i 9.'A circular saw machine as set forth in claim 8, saidyokeincluding anupper arm projecting substantially rearw'ardlyfrom the shoesupport and having a downwardly exten'dedrear portion, an arm extendingsubstantially rearwardly from the saw support, and a rock shaft rigidlyinter- 1 connecting said arms.

10. Ina circular saw machine,-the combina tion with acircular saw and atable for support anda connection from said element to the saw forraising the sawproportionately to the movement of V said ,element,whereby the depth of the out taken bythe sawis regulated by thethickness ot in'gwork'fed to said saw, said saw being normally disposedsubstantially in its entirety below the work surface of said table, of'lajcontrol element normally in the path of work advancing to, said sawand movable ,by the work to clear said path,

the work. a h I i 11. A circular saw machinecomprising a cirg setforth m3 claim 1, an adjusting screw attaching said shoe" cular saw,a table forsupporting work fed tothe saw, a support beneaththe level of thetablemounting the saw rotatively, a shoe normally resting on said table andpresenting to the work a face. actut'ely divergent'to .the table, a yokehaving a lower extremity rigidly. carrying said saw support and .havingan upper extremity extending substantially above said-shoe to trans-1mitloadfrom the saw and support to the shoe,

meanspivoting the yoke to turn about an axis substantially parallel tothe saw axis,andre note idly clampingthe shoe to said connection in Aselective positions established'bysaid screw] A x 7. Acircular saw asset forth in claim 1, said h connection comprising arms extendingsubstantially rearwardly fromysaid shoe [and bearing,

and means horizontally: spaced from the table a and rigidlyinterconnecting said arms.

from the saw axis in the direction of work feed, 'anda connectionbetween the shoe and upper extremity of-the'yoke, including means forselectively adjusting the shoeupwardly and downwardly on the yoke toestablish selective pivotal positions of the'yok e and to therebyselectively raise and lower thesaw. V

a 'WILLIAM nrvvoonwann, i

